Saudi Foreign Minister Adel al-Jubeir had said on Thursday that Qatar's crisis will not be on the table at the Arab League summit.
The league said it condemns the use of chemical weapons but did not lay direct blame on any one party.
"We stress our absolute condemnation of the use of chemical weapons against the sisterly Syrian people and we demand an independent global investigation to guarantee the application of worldwide law to everyone proven to use chemical weapons", said its final statement. Iran is an ally of Syria's President Bashar al-Assad and has been waging a proxy war in Yemen against Riyadh. In response to the alleged incident, the United States, the United Kingdom and France have conducted airstrikes on several targets in Syria.
In response, Saudi Arabia renamed this year's summit "Quds [Jerusalem] Summit".
Dhahran, Apr. 16 (BNA): King Salman bin Abdulaziz Al-Saud's decision to rename the 29th Arab Summit as the "Jerusalem Summit" hailed step by all participants, said the Organization of Islamic Cooperation (OIC), hailing Riyadh's donations to Palestinians.
Saudi Arabia, Bahrain and Qatar have previously issued statements in support of the action while Egypt, Iraq and Lebanon expressed concern.
Last December, Trump reversed decades of USA policy by announcing the United States' recognition of Jerusalem as the capital of Israel and the moving of the US embassy to Jerusalem.
Sunday's meeting will be the first Arab League summit since Egypt, Saudi Arabia, the United Arab Emirates and Bahrain cut their diplomatic ties with Qatar 10 months ago and the first since President Donald Trump announced his decision to relocate the USA embassy from Tel Aviv to Jerusalem. Saudi Arabia's king turned his attention with long-time foe Iran - only 160 kilometres (100 miles) across the Gulf from Dhahran.
While tensions have eased slightly in recent months, Qatar's Emir Sheikh Tamim bin Hamad Al Thani is not attending the summit - a sign that the almost year-old dispute is far from being resolved.
Al-Jubeir, Saudi foreign minister, said Qatar was not on the agenda because "it's not a big issue".
Heads of state and top officials from 21 Arab states will attend the summit excluding Syria that was suspended from the league in 2011 over Syrian regime's crackdown on protesters after peaceful protests in the southern part of the country. "It's a very, very small problem".
Moreover, Qassemi called on the Arab League member states to take necessary measures to build confidence and promote stability in the region.